Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

trunnion

play
noun trun·nion \ˈtrən-yən\

Definition of trunnion

  1. :  a pin or pivot on which something can be rotated or tilted; especially :  either of two opposite gudgeons on which a cannon is swiveled



Origin of trunnion

French trognon core, stump


First Known Use: circa 1625

Rhymes with trunnion


Learn More about trunnion


Seen and Heard

What made you want to look up trunnion? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 7, 2016

a slight offense

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

pince-nez duvet spindrift kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ